Why I can`t receive pushes from Intercom, but It connected to the app.

In app I already have FirebaseMessagingService for my own service. And yes, I read "Step 7. Using Intercom with other FCM setups (Optional)" in tutorial, but it doesn`t work for me. Does anybody knows what the problem might be?

Also want to add:

*If I create clean Firebase project, Intercom pushes is worked.

*But if I use main Firebase project, which is already used in the app, then Intercom pushes don`t work.